Aortic dissection is a dangerous and critical disease with extremely high mortality and disability rate.In clinical practice,aortic dissection should be highly suspected when patients developed dying-like severe chest and back pain.CT and MRI have been the reliable tools for diagnosing aortic dissection.In recent years,endovascular therapy has become the preferred treatment for Stanford type B aortic dissection,and some patients with Stanford type A dissection who cannot receive open surgery may also be treated with endovascular therapy.In order to improve endovascular treatment,to develop new instruments and to study the pathogenesis of aortic dissection,the preparation of stable and reliable animal models is very necessary.This paper aims to make a brief review about the research status concerning the preparation of animal models of aortic dissection.

Animals ; Female ; Isocyanates ; toxicity ; Male ; Malondialdehyde ; metabolism ; Mice ; Nitric Oxide ; metabolism ; Nitric Oxide Synthase ; metabolism ; Pregnancy ; Prenatal Exposure Delayed Effects ; Superoxide Dismutase ; metabolism ; Testis ; drug effects ; metabolism

The effects of propanoic acid accumulation on the growth and acid production of Propionibacterium shermanii are reported in this paper, the glucose consumption, acid production and cell growth curve are measured in the batch fermentation process with 6%glucose serves as carbon source and pH value controlled at 6 5 If 1%, 3%, and 6% propanoic acid are added to the broth 24 hours after inoculation, the cell dry weights obtained at the end of the fermentation change to 75 3%, 65 4%, 52 9% of the CK respectively, at the same time, the acid accumulation becomes 79 3%, 69 2%, 39 3% of the CK respectively But even 6% propanoic acid is added, the glucose consumption and acid production could not be stopped completely The cell dry weight increased 60% if part of the propanoic acid is removed from the broth and replaced by fresh medium

OBJECTIVE: To establish the diagnosis of amniotic fluid embolism with blood samples by liquid-based cytology technique and to study the validity of method. METHODS: The blood samples were collected from patients who suffered from amniotic fluid embolism. The components of amniotic fluid in blood samples were examined with blood smear by two direct smear methods (supernatant smear, sediment smear) and two liquid-based cytology methods (automatic smear, manual smear). The positive detection rate of each method was calculated. RESULTS: The positive detection rates of two liquid-based cytology methods (84.6% and 92.3%, respectively) were much higher than those of two direct methods (53.8% and 61.5%, respectively). CONCLUSION The liquid-based cytology technique could improve the positive detection rate of amniotic fluid embolism.
Amniotic Fluid ; Cytological Techniques/methods* ; Embolism, Amniotic Fluid/diagnosis* ; Female ; Humans ; Pregnancy

The aim of this study was to explore the effect of 2 different spliceosomes of X-box binding protein 1 (XBP-1), the spliced form XBP-1s and unspliced form XBP-1u, on myeloma cell differentiation and its mechanism. The overexpression plasmids pcDNA3.1-C-XBP1u and pcDNA3.1-C-XBP1s were constructed and transfected into myeloma cell line U266, RPMI8226. The morphology of U266 and RPMI 8226 cells was observed by means of light microscope, the expression rate of CD49e on cell surface was detected by flow cytometry, the ELISA was used to determine the changes of light chain protein level in supernatants of cell culture, the Western blot was used to assay the expression changes of XBP1u and XBP1s. The results showed that the overexpression of XBP1u could promote the myeloma cell differentiation morphologically displaying the maturation of plasmocytes, the CD49e positive expression rates on surface of U266 and RPMI8226 cells were obviously up-regulated from 9.02±0.3% and 5.17±0.92% in control group to 27.7±1.14% and 13.97±1.79% respectively (p<0.01), the levels of light chain protein in supernatants of U266 and RPMI 8226 cell cultures increased from 474.75±19.52 ng/ml and 289.44±6.19 ng/ml in control group to 692.34±21.17 ng/ml and 401.55±13.7 ng/ml respectively (p<0.01, p<0.05), while the above-mentioned parameters in the overexpressed XBP-1s showed no significant changes, which indicated no promotive effect of overexpressed XBP1s on myeloma cell differentiation. It is concluded that the up-regulation of XBP-1u expression plays an important role in the differentiation of myeloma cells.
Cell Differentiation ; genetics ; Cell Line, Tumor ; DNA-Binding Proteins ; genetics ; Gene Expression Regulation, Neoplastic ; Humans ; Multiple Myeloma ; genetics ; pathology ; Regulatory Factor X Transcription Factors ; Spliceosomes ; genetics ; Transcription Factors ; genetics ; Transfection ; X-Box Binding Protein 1

OBJECTIVETo explore the molecular mechanism of myeloma cell differentiation induced by low dose tunicamycin.

METHODU266 and RPMI8226 cells were incubated with low dose tunicamycin for 72h. Surface CD49e expression was assayed by flow cytometer (FCM), light chain protein in the cell culture supernatant by ELISA, the unfolded protein response (UPR) related gene GRP78 and GRP94 by real time PCR, and XBP1u and XBP1s transcription and translation changes by real time PCR and Western blot. After XBP1u gene was interfered with small RNA, and constructed plasmid was transfected into myeloma cells to up-regulated gene XBP-1u and XBP-1s reseparately, the differentiation of myeloma cells was observed again.

RESULTSSmall dose tunicamycin could induce both U266 and RPMI8226 myeloma cells differentiation. Compared with the control group, cell morphology changed to mature feature, the nucleo- cytoplasm ratio decreased and nucleolus reduced or disappearance, CD49e expression increased the light chain protein concentration of cell culture supernatant was up-regulated and UPR related gene GRP78 and GRP94 were up-regulated during the differentiation. XBP-1u was up-regulated at both transcription and translation level, while XBP-1s down-regulated. After XBP1u gene expression interfered with small RNA, cell differentiation was disturbed. Cell differentiation was induced while XBP-1u gene was up-regulated by plasmid transfection.

CONCLUSIONLow dosage of tunicamycin could induce myeloma cell UPR and differentiation, while XBP-1u a key role during the process.

Cell Differentiation ; drug effects ; Cell Line, Tumor ; DNA-Binding Proteins ; genetics ; Humans ; Multiple Myeloma ; metabolism ; Transcription Factors ; genetics ; Tunicamycin ; Unfolded Protein Response

Objective To evaluate the clinical parameters that can predict whether a patient can get significant improvement at the 10th week,or whether a patient can have an extended length of remission after discontinuing the infusion in ankylosing spondylitis(AS)patients treated with three standard infusions of in- fliximab.Methods Sixty-three AS patients were given three infusions of 5 mg/kg of infliximab at week 0,2 and 6;and were evaluated serially before each infusion and week 10.Afterwards.patients were followed by telephone interview until their disease activity was≥60% of the baseline level.At that point,disease was con- sidered to relapse.Clinical parameters at baseline as well as at week 2 were used to identify factors which might predict an improvement at week 10,or predict a delayed relapse.A predictor was regarded as being use- ful if the area under the curve(AUC)more than 0.75 when analyzed by receiver operator calculations(ROC). Results No parameters at baseline have sufficient predictive value.However,ASAS20(Assessment in Anky- losing Spondylitis International working Group criteria)at week 2 predicts improvement at week 10.and also duration of remission after discontinuing the infliximab at week 6.Conclusion The response to one pulse of infliximab is the best predictor of subsequent response as well as rate of relapse after discontinuing the inflix- imab.

OBJECTIVEDevelopment and application of a real time fluorescent quantitative PCR (FQ-PCR) assay for detecting WU polyomavirus in children with low respiratory tract infections.

METHODSThe VP2 gene of WU polyomavirus was selected as the detection target, from which the real time primers and probes were designed. The standard curve was established by using recombinant plasmid as template. And the FQ-PCR assay for specific detection of WU polyomavirus was established. The specificity, sensitivity and reproducibility of the method were evaluated. Furthermore, the clinical specimens from children with respiratory tract infections collected in Wenling First People's Hospital were quantitatively detected using this method.

RESULTSIn this study, the FQ-PCR method was established to detect a specific fragment in VP2gene of WU polyomavirus. The standard curve coefficient R2 was 0.998. And this method can detect as low as 50 copies recombinant plasmid. The clinical specimens of sputum and throat swab from children with respiratory tract infections were quantitatively detected using this method. 7 sputum specimens were detected as WU polyomavirus positive in 700 sputum specimens, the positive ratio was 1.00%. No positive specimens were detected in 146 specimens of throat swabs and 846 blood samples from same patient population.

CONCLUSIONThe results indicated that the FQ-PCR assay method established in this study was specific, rapid and sensitive for detecting WU polyomavirus in children with lower respiratory tract infections. The sputum specimen is more suitable to be used for gene detection of WU polyomavirus than throat swab or blood.

Child ; Child, Preschool ; Female ; Humans ; Infant ; Male ; Polyomavirus ; isolation & purification ; Real-Time Polymerase Chain Reaction ; methods ; Respiratory Tract Infections ; virology ; Sputum ; virology

Adolescent ; Carcinoma, Renal Cell ; metabolism ; pathology ; Desmin ; metabolism ; Diagnosis, Differential ; Humans ; Leg ; MART-1 Antigen ; metabolism ; Male ; Melanoma ; metabolism ; pathology ; Melanoma-Specific Antigens ; metabolism ; Perivascular Epithelioid Cell Neoplasms ; metabolism ; pathology ; surgery ; Sarcoma, Clear Cell ; metabolism ; pathology ; Skin Neoplasms ; metabolism ; pathology ; surgery

OBJECTIVETo investigate effect of particle size on oral absorption of silymarin-loaded solid lipid nanoparuicles.

METHODSolid lipid nanoparticles (SLN) of various sizes (150 nm, 500 nm and 1000 nm) using Compritol 888 ATO as the material and silymarin (SM) as a model drug were prepared. Silybinin concentration in plasma of rats were determined by RP-HPLC with UV detector. The main pharmacokinetic parameters were calculated by 3p97.

RESULTResults showed that the AUC of 150 nm SLN was 2.08 fold that of 500 nm SLN and 2.54 fold of 1000 nm SLN treated orally to rats (P < 0.05). The oral bioavailability of 150 nm SLN was remarkably higher than the other two size SLN.

CONCLUSIONThis has important implications in designing of SM-SLN as a new oral drug delivery system.

Administration, Oral ; Animals ; Area Under Curve ; Biological Availability ; Drug Carriers ; Drug Delivery Systems ; Excipients ; Fatty Acids ; Female ; Male ; Milk Thistle ; chemistry ; Nanostructures ; Particle Size ; Plants, Medicinal ; chemistry ; Rats ; Rats, Sprague-Dawley ; Silymarin ; administration & dosage ; isolation & purification ; pharmacokinetics